Home / 5,418.84-8,128.20-1,720.97

Finding the Fourth Proportional to 5,418.84, 8,128.20 and 1,720.97

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Solution

The fourth proportional to 5,418.84, 8,128.20 and 1,720.97 is: 2,581.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.84 : 8,128.20 = 1,720.97 : x
  2. Step 2: Convert to fraction form
    5,418.84/8,128.20 = 1,720.97/x
  3. Step 3: Cross multiply
    5,418.84x = 8,128.20 × 1,720.97
  4. Step 4: Simplify right side
    5,418.84x = 13,988,388.35
  5. Step 5: Solve for x
    x = 13,988,388.35/5,418.84
  6. Step 6: Final answer
    x = 2,581.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.